Safety dust guard



11, 1-933. s. w. GRIFFITHS- 1,931,348

SAFETY DUST GUARD Filed Dec. 5, 1932 INVENTOR ATTO R EV Patented Oct.17, 1933 UNITED STATES PATENT OFFICE SAFETY DUST GUARD Samuel W.Grlfllths, Jermyn, Pa.

Application December 5,

1 Claim.

and conveying and collecting such material at a place foreign to thedrill and which effectively protects the operator of the drillheretofore subjected to the material as it is discharged by the drill.

With these and other objects in view this invention consists in certainnovel features of construction, combination and arrangement of parts tobe hereinafter more fully described and .claimed.

For a complete understanding of my invention, reference is to be had tothe following description and accompanying drawing, in which Figure 1 isa side elevation illustrating the drill and its operating meanspositioned for operation with a safety guard applied to the drill andconstructed in accordance with my invention.

Figure 2 is a sectional view taken on the line 22 of Figure 1.

Figure 3 is an end view illustrating the guard. Figure 4 is a sectionalview taken on theline 4-4 of Figure 3.

Referring in detail to the drawing, 1 indicates a pneumatically operateddrill of a conventional type for the purpose of boring and drillingholes in the ground and the drill has the usual air feed pipe 2, asshown in Figure 1, to which is 35 connected a control valve 3. Thecontrol valve is connected to a safety guard 4 by a flexible tube 5. Thesafety guard 4 is mounted on the bit of the drill and bears against thesurface of the ground so as to receive from the opening 10 being formedby the drill dirt and other foreign matter. An outlet pipe 6is-connected to the guard 4 so that the dirt and other foreign mat-1932. Serial No. 645,839

material suitable for the purpose, preferably spongy rubber so that thewall may yield during the various movements of the drill and stillmaintain a contact with the latter. A yieldable sleeve 13 is mounted onthe cylindrical element ,7 and is adapted to hear at one end against thesurface of the dirt or ground during the operation of the drill so thatdirt forced out of the hole by the bit will be received within thecylindrical element '7 and discharged therefrom through the tube 6 bythe air pressure from the feed line 2. 7

An ear 14 is carried by the cylindricalelement 7 and has a. slotted arm15 connected thereto by a bolt 16 equipped with a wing nut permittingthe arm to be adjusted relative to the ear. A hook-shaped element 1''!is adjustablysecured to the slotted arm 15 and carries an anchoringelement or plug 18 adapted to be driveninto the ground for the purposeof supporting the guard over the opening being formed by the drill bit.

While I have shown and described the preferred embodiment of myinvention, it will be understood that minor changes in construction,

combination and arrangement of parts may be made without departing fromthe spirit and 500 of my invention, as claimed.

Having described the invention, I claim:

A safety dust guard comprising a cylindrical element, a yieldable wallcarried by one end of the element and having an opening to permit adrill bit to extend therethrough and through the cylindrical element, ayieldable sleeve on the element to engage the ground about the drillbit, means for connecting the interior of the cylindrical element to anair pressure means, outlet means on the cylindrical element, a slottedarm pivotally and removably secured to the cylindrical element, and ananchoring element adjustably secured to the slotted arm.

SAMUEL W. GRIFFITHS.

ter collected thereby may pass out of the guard 4 under the influence ofthe air pressure received 45 from the feed line 2 and be delivered tosome the flange 10 is a yieldable wall 11 provided with an opening 12,the walls of which engage the bit 55 of the drill. The wall 11 isconstructed of any

